I've added a dummy function and didn't cover it with tests and the changed file wasn't reported in the end (even though the overall coverage was shown)
- name: Post coverage report
uses: romeovs/lcov-reporter-action@v0.3.1
with:
lcov-file: "${{ env.WORKING_DIRECTORY }}/coverage/lcov_head.info"
lcov-base: "${{ env.WORKING_DIRECTORY }}/coverage/lcov.info"
github-token: "${{ secrets.SA_GITHUB_TOKEN }}"
delete-old-comments: true
filter-changed-files: true

I've added a dummy function and didn't cover it with tests and the changed file wasn't reported in the end (even though the overall coverage was shown)